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Vane of centrifugal blower and centrifugal blower with said vane

A blower, centrifugal technology, applied in the field of centrifugal blower, to achieve the effect of low noise and improving the efficiency of the blower

Inactive Publication Date: 2003-02-05
DAIKIN IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the noise caused by the turbulent vortex near the circular main board is not only produced by the multi-blade blower, but also a common problem of the centrifugal blower including the turbo blower.

Method used

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  • Vane of centrifugal blower and centrifugal blower with said vane
  • Vane of centrifugal blower and centrifugal blower with said vane
  • Vane of centrifugal blower and centrifugal blower with said vane

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0044] (1) Composition of multi-blade blower

[0045] The multi-blade air blower (centrifugal air blower) according to one embodiment of the present invention differs only in the following points: Figure 1 ~ Figure 3 In the impeller 13 of the multi-blade air blower 10 shown in the prior art, the inner peripheral side edges of the plurality of blades on the main plate 31 have concavo-convex waveforms, and the side plates 32 are formed with concavo-convex waveforms on the side of the main plate 31. The front of the rotation direction of the plurality of inter-blade parts 35 of 31 has a notch shape.

[0046] Figure 4 It is a side view of the multi-blade air blower 40 of this embodiment, Figure 5 with Image 6 It is a side view and a plan view of the impeller 43 of the multi-blade blower 40 .

[0047] The multi-blade air blower 40 is mainly composed of an impeller 63 , a housing 11 covering the impeller 63 , and a motor 14 for rotating the impeller 43 .

[0048] A plurality...

experiment example

[0064] The result of the noise measurement experiment performed on the multi-blade air blower using the impeller of this embodiment is demonstrated.

[0065] This experiment is for figure 2 and image 3 The blower shown in the conventional example, Figure 5 and Image 6 The blower of this embodiment shown was subjected to a measurement experiment. In addition, in this embodiment, for the purpose of noise reduction, the wave shape 64 formed on the main plate, the wave shape 66 formed on the side plate 62, and the slots of the interblade portion 65 of the main plate 61 are formed simultaneously. Therefore, in order to confirm the noise reduction effect of each of these three shapes, an impeller having only one shape of each of the above three shapes was prepared, and a noise measurement experiment was performed. The results of the noise measurement experiment are as follows:

[0066] ① Only the main plate 61 of the impeller formed in the wave shape 64 reduces the noise va...

no. 2 Embodiment approach

[0089] This embodiment is a case where the present invention is applied to an impeller of a turbo blower. That is, it is an embodiment in which the wave shape formed on the main plate 61 of the multi-blade blower 40 of the above-mentioned embodiment is applied to the impeller 73 of the turbo blower.

[0090] Figure 9 It is a planar sectional view of the turbo blower impeller 73 of this embodiment.

[0091] The impeller 73 has a plurality of blades 93 fixed to the outer periphery of the disc-shaped main plate 91, and the other ends of the plurality of blades 93 are connected by a guard ring (side plate) not shown.

[0092] A plurality of blades 93 are formed at equal intervals in the direction of rotation on the outer periphery of the main plate 91 . A concavo-convex wave shape 94 is formed near the inner peripheral side edge of these plurality of blades 93 along the inner peripheral side edge. Here the waveform shape 94 is the same as in the foregoing embodiment, and has ...

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Abstract

The present invention provides an impeller allowing noise to be reduced and a low noise centrifugal blower, the multi-vane centrifugal blower (40) comprising mainly an impeller (63), a casing (11) covering the impeller (63), and a motor (14) rotating the impeller (43), wherein the impeller (43) is so formed that a plurality of blades (33) are fixed to the outer peripheral edge of a disk-like main plate (61) and the other ends of the plurality of blades are connected to each other through an annular side plate (62), the plurality of blades (33) are formed on the outer peripheral edge of the main plate (61) at equal intervals in rotating direction, an irregular waveform shape (64) is formed near the inner peripheral edge part of the plurality of blades (33) along the periphery of the inner peripheral edge part, and an irregular waveform (66) is formed on the surface of the side plate (62) on the main plate (61) side.

Description

technical field [0001] The invention relates to a centrifugal fan impeller and a centrifugal fan equipped with the impeller, in particular to a centrifugal fan impeller in which the ends of a plurality of blades extending from a main board are connected by annular side plates and a centrifugal fan equipped with the impeller. Blower. Background technique [0002] In gas regulators such as gas purifiers and air conditioners (hereinafter referred to as air conditioners), air is blown using a centrifugal blower. As a previous example is Figure 1 ~ Figure 3 Shown is an example of a centrifugal blower called a multi-blade blower. figure 1 It is a side view of the multi-blade blower in the previous example; figure 2 It is an oblique view of the multi-blade blower impeller of the previous example; image 3 It is a plan view of the conventional multi-blade blower impeller. [0003] The multi-blade air blower 10 is composed of an impeller 13, a casing 11 covering the impeller 1...

Claims

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Application Information

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IPC IPC(8): F04D29/28F04D29/66
CPCF04D29/667F04D29/681F04D29/283
Inventor 东田匡史
Owner DAIKIN IND LTD